Mixing valve



1934- E. F. NIEDECKEN MIXING- VALVE Filed Sept. 20. 1930 Patented Jan.9, 1934 UNEE 1,943,li-t

Application September 20, 1930 Serial No. 483,277

3 Claims. (Cl. 137-411) This invention relates to an improvement inmixing valves of the type designed for use in supplying a stream of hotor cold water 01 a stream consisting of a mixture of hot and cold 5water.

In certain types of mixing valves of this character it is desirable tohave the housing of the valve provided with a removable cap which isthreaded into a part of the housing of the casing.

Mixing valves of this type are built into the wall of the bathroom orinto the structure of the building or into the other structure withwhich they are associated, and, in all prior constructions, theprovision of a screw threaded cap on the valve casing, while desirablefor manufacturing and other reasons tends to render the removal of thecap difficult and also complicates the problem of securing the dialplate associated with the valve in proper position.

One of the principal objects of the present invention is to provide amixing valve of this character and of the type having a removable screwcap or closure and which is so constructed and organized that the capmay be readily and easily removed and applied and the dial platesecurely fastened in proper position. Another object is to provide amixing valve of this character and having these advantages and which isof simple and durable construction, reliable and effective in use andeasy and comparatively inexpensive to manufacture.

Other objects and advantages reside in certain novel features of theconstruction, arrangement and combination of parts which will behereinafter more fully described and particularly pointed out in theappended claims, reference being had to the accompanying drawing,forming a part of this specification, and in which:

Figure l is a view partly in side elevation and partly in longitudinal,vertical section showing a mixing valve embodying the present invention;

Figure 2 is a view in front elevation showing the dial plate and theoperating handle for the mixing valve; and

Figrue 3 is a detail view in elevation illustrating the structure of theanchoring clamp and nut for the dial holding screw.

Referring to the drawing, the numeral 1 designates generally the casingof a mixing valve provided at one end with a removable cap 2 which isthreaded into the casing 1 as indicated at 3.- The valve structureinside of the casing is not shown as per se it forms no part of thepresent invention. This valve structure may correspond to that shown inPatent 1,054,023, granted February 1913, to Edward F. Niedecken, formixing valve, or to that shown in Patent 1,669,772, granted May 15,1928, to Edward F. Niedecken. The valves are operated by means of aspindle 4, to the outer end of which a handle 5 is secured by means of ascrew 6. The spindle 4 passes through a stufling box or packing 7 formedat the outer end of a tubular extension 8 of the cap 2. The tubularextension 8 terminates in a hexagonal portion 9 adapted for coactionwith a wrench whereby the cap 2 may be applied or removed. Byformingthis extension 8 on the cap and having it terminate in a wrench engagingportion, the mixing valve may be positioned in its usual relation to thewall structure indicated at W and yet application or removal of the cap2 is greatly facilitated. As illustrated in Figure 1, the wall structureW is built up to and around a substantially cone-shaped shield orhousing 10, the function of which is to prevent the accidental enclosingof the mixing valve and associated parts by the structure of the wall.

A dial plate 12 is provided and covers the opening of the housing 10 andalso the portion of the wall W contiguous with or immediatelysurrounding the outer end of the housing 10. Centrally the dial plate isapertured to permit of the projection of the spindle 4 therethrough. Theface of the dial plate 12 contains the usual indicia 13 coacting withthe pointed end 5' of the handle 5 to indicate how the handle 5 must beadjusted to provide hot or cold water, a mixture of hot and cold wateror to be shut off. It is im portant that the dial plate be located andsecured in a definite angular position in order that it may eifectivelyperform its function. To so secure the dial plate the present inventionproposes an anchor clamp 14 having a nut 15 integrally formed therewith,the nut coacting with a holding screw 16 which is extended through anopening in the dial plate and threaded into the nut. The anchor clamp 14is mounted on the tubular extension 8 and received in an annular groove17 formed between the rear end of the hexagonal portion 9 and an annularor circumferential rib 18. The rib 18 is formed integral with thetubular extension 8. The anchor clamp 14 is constructed of metal whichis rather stifily resilient, that is to say, it is sufiiciently bendableto enable it to be shaped as shown in full lines in Figure 3 and yet issufiiciently stiff and strong to enable it to re tain this form in theassembly. As illustrated in the drawing, the anchor clamp is providedwith a strip-dike attaching portion 20, which portion, prior to theassembly of the anchor clamp with the tubular extension 8 has its endextended as shown at 20 (see dotted line showing in Figure 3). Thisformation permits the anchor clamp to be readily slipped into positionin the groove 17 of the tubular extension and when so positioned theextended end 20' is bent down to the full line position shown in Figure3 whereby the anchor clamp is securely interconnected with the tubularextension. The nut 15 depends vertically from the tubular extension andwhen the screw 16 is threaded through the nut 15 and tightened up, theanchor clamp is canted or inclined and it firmly grips the walls of thegroove 17 whereby to prevent angular displacement of the clamp 14 anddial 12. This advantage is had without complicating the construction andwhile providing for ready removal and replacement of the parts. In thisconnection, it will be understood that it is frequently necessary toremove the dial and the screw cap 2 so as to ren der the interior of thevalve casing accessible for purposes of adjustment, replacement orrepair.

The invention claimed is:

1. A mixing valve comprising a valve casing, a removable screw capthreadedly connected to the valve casing and provided with a tubularextension, an operating spindle for the valve, a dial plate associatedwith the operating spindle and means for securing the dial plate inproper position and comprising an anchor clamp encircling andinterengaged with said tubular extension of the screw cap and providedwith a nut and a screw engaged with the dial and threaded to said nut.

2. A mixing valve comprising a casing, a removable screw cap threadedlyconnected to the casing and provided with a tubular extension formedwith an annular groove, an operating spindle for the valve, a dialcooperable with the spindle, and means for securing the dial in properposition and comprising an anchor clamp having a strip-like portion bentinto engagement with the annular groove of the tubular extension, a nutformed integral with the anchor clamp and a screw engaged with the dialand threaded into the nut.

3. In a device of the character described, means for securing a dialplate of a mixing valve in position and including an anchor clamp havinga bendable attaching portion adapted to be secured to a stationary partof the mixing valve, said anchor clamp having a nut integrally formedtherewith, and a screw engaged with the dial plate and threaded intothenut.

EDWARD F. NIEDECKEN.

